What is the approximate relative humidity in the situation shown below? 9% 21% 30% 44%

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You Asked ➤ What is the approximate relative humidity in the situation shown below?

↴ OUR CHOICES ↴

A: 9%

B: 21%

C: 30%

D: 44%

Answer ➤ D: 44%  

Explanation: To solve this problem, we need to know the formula on receiving the wet bulb depression shown on the thermometers. While looking at this image, I can see there is a dry bulb and a wet bulb. We know that dry bulb is 29.8 degrees and that the wet bulb is 20.9 degrees. If we find the difference, we will solve for the depression.

➤ 29.8 - 20.9

➤ = 8.9 degrees Celsius

The next step is to look at the psychrometric table you have by the timer and thermometer and figure out what the approximate relative humidity is by looking for the row that matches the dry bulb and wet depression temperature to the nearest value.

➤ The nearest value to  29.8 degrees (the dry bulb) is 30 degrees.

➤ The nearest value to 8.9 degrees is 9 degrees.

Find which value intersects with the row and column of the table. We can see that the value intersect at 44 percent from the row and column of the graph. That is our final approximate relative humidity.  

I hope this answer is helpful to you, but please let me know if you have any other questions regarding it.    

- Qamar  

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